Municipal signal apparatus



2 SheetsSheet .1

(N o Model.)

B. J. NOYES, MUNICIPAL SIGNAL APPARATUS.

No. 447,060. PatentedI'eb. 24,1891.

Mar/i 07; Jerrw'aeJ 2 sheetssheet 2.

(No Model.)

B. 'J. NOYES. MUNICIPAL SIGNAL APPARATUS.

' Patented Feb. 24,1891.

Fr es.

.. BERNIOE J. NOYES, or- BOSTON, MASSACHUSETTS.

M U NlClPAL' SIGNAL APPARATUS.

SPECIFICATION forming part of Letters Patent No. 447,060, dated February 24, 1891. Application filed September 14,1888. Serial No. 285,354. (No model.)

To all whom it may concern.-

Be it known that I, BERNIOE J NOYES, of

Y Boston, county of Suffolk, State of Massachuparts.

- the reception of others.

This invention has for-its object to construct a municipal telegraph system especially adapted for police signaling purposes, wherein several sub-stations are connected with a central station by an electric circuit, the essential feature being to provide mechanism at the sub-stations for transmitting several different code-signals which shall be sent to the central station and received on any suitable receiving-instrument, and also to provide mechanism at the sub-stations for eitecting the transmission of an impulse different from that employed in the transmission ofthecode-signals,whichimpulseshalloperate orcause to operate an audible alarm or indicatin g signal at the central station, whereby a bell or other suitable audible alarm or indicatinginstrument maybe made to respond upon the reception of some of the signals and not upon The signals, as herein shown, are transmitted overa metallic circuit and the instrument for operating or calling into operation the audible alarm is included in another circuit, (shown as a ground circuit,) formed by ground-taps from the metallic circuit. The instrument which I employ for operating or calling into operation the audible alarm is one adapted to produce or transmit an alternating current, and is herein shown as a magneto-electric machine or generator, and at the central station a polarized signal-receiving instrument is shown. The magneto-electric machine may be operated independently or in conjunction with the other signal-transmitting mechanism automatically, as desired; but for simplicity of operation with less liability of mistakes I prefer -to operate the same automatically.

At the central station a polarized signal-receiving instrument is empl0yedas, for instance, a polarized hell or a drop controlled by a polarized magnet-the drop closing a local-battery circuit containing a bell which will continually ring until the drop is returned to its normal position. A polarized signal receiving instrument is located at the sub-station, which is employed to respond to signals transmitted from the central station as an answer-back signal. Telephones are included in the ground-circuit, which may be employed, as usual.

Figure 1 shows a portion of a signaLtransmitter and the magneto-electric generator and connecting mechanism under the control of the pointer for automatically operating the generator; Fig. 2, a detail of the actuatingpull of the transmitter; Fig. 3, a diagram to be referred to showing the circuits and instruments at the sub-stations and central station; Fig. 4, a diagram of the circuits contained in the signal-box atwthe sub-station, and also a diagram of the circuits and instruments at the central station to be referred to; and Fig. 5, a sectional detail taken on the dotted line y y, Fig. 2, showing the outside key and switch operated by it.

The multiple signal transmitter herein shown is substantially such as shown in United States Patent No. 320,032,date :l June 10, 1885, it comprising a series of signal-wheels a a a a a fixed to a shaft, a series of pens b b b b b, a signal-selecting cylinder and pointer, (not shown 5) yet any other wellknown form of signal-transmitter may be employed Without departing from this invention.

The winding-arm c, actuating-pull c, and locking device c herein shown are suhstantially the same as shown in United States Patent No. 375,083, dated December 20, 1887, the winding-arm being herein shown as carrying the movable member 0 a switch which is employed to open and close the shunt of the box.

Several boxes, as S, are included in the main circuit A, which includes the main battery A and a receiving-relay A The armature of the receiving-relay A controls a local circuit 2, including a battery 3 and a magnetfor the register R. The signals in this present instance which will be transmitted by the multiple-transmitter consist of the box-number by wheel a, telephone by wheel a, wagon by wheel a, and other signals by wheels a (b and the signals will be transmitted by the operation of the pull in any usual way, or by means of an outside key, as represented by detail, Fig. 2.

In order to distinguish the important from the non-im portant signals-such, for instance, as the wagon and telephone signals from the remaining signalsI employ at the box an instrument for producing or transmitting impulses different from those employed for the regular signals, the instrument herein shown being a magneto electric generator m arranged to transmit alternating currents, the said instrument being included in a ground tap or branch. f, leading from the line-circuit or shunt therefrom.

The magneto-electric generator may be operated by hand just before or just after a special signal has been transmitted; but I prefer to operate the same automatically, as by means of the pull, as best shown in Fig. l.

The actuatingpull c has teeth outon it to form a rack-bar, and the rotatable armature of the magneto-electric generator has fixed to it a pinion n, which is engaged byatoothed wheel a, and an arm n is loosely connected with the shaft upon which the wheel a 1'0- tates, said arm carrying the toothed wheel a which is in engagement with the wheel '17 The toothed wheel a is designed to engage and disengage the rack-bar or pull 0', and when in engagement vertical motion of the pull causes rotation of the armature of the magneto-electric generator m. When disengaged from the pull, the pull may be operated to effect the operation of the transmitter without operating the magneto-electric generator.

As a means for throwing the rotatable armature of the magneto-electric generator or into operative connection with the pull, I have placed a cam n; upon the pivot of the pointer 17, (see dotted line,) so that when the pointer is in certain positions to cause the transmitter to transmit certain signals the wheel n will be in engagement; but when in other positions itwill not be in engagement, so that the magneto'electric generator may be operated for some signals and not others.

At the central station a polarized signalreceivinginstrument u (see Fig. 3) is provided which will be included in a ground tap or branch from the main line. As there will be several boxes on the circuit, the ground tap or-branch at each box is normallyppened by a switch to, (herein shown as controlled by a movement of the door a of the boX,) so that when the door is open the ground tap or branch at that particular box will be closed. As it is desired to transmit a citizens callsignal, which it will be understood as being a wagon-signal, when the door of the box is closed, as by an outside key, I have also provided a switch u", (see Fig. 4,) which will act to close the ground tap or branch when the key is inserted, the end of the key bearing against the movable member of the switch. As before stated, the outside key when turned operates the pull, (see Fig. 2,) and, as

the pointer is normally in Verticalposition (meaning the wagon-signal) and the magneto-electric generator in operative connection, the bell to will ring when the outside key is turned, and, as herein shown, just previous to the transmission of the signal by the multi ple-signal transmitter.

I do not desire to confine myself to the time for transmitting the impulse orimpulses which operate or call into operation the bell or other indicating signal, nor to the particular construetion herein shown for operating the magneto-electric generator.

111 Fig. 4:, in lieu of the bell to I have shown a polarized instrument 10 which, when effected, releases the drop u, closing the localbattery circuit a which includes the coils of an electric bell.

As an answer-back signal I have included in the ground tap or branch at the central station a magneto-electric generator m and at the substation a polarized receiving-instru in cut 077. and at the central station I have also included a switch m which, when closed, cuts out the polarized instrument a rendering it inoperative at such time.

At the sub-station and central station telephonic instruments T will preferably be employed, they being included by a switch in the ground taps or branches in any usual way.

I claim- 1. The combination, with a signal-box containing a multiple-signal transmitter and an instrument for sending alternating impulses, and means for operating the latter in conjunction with the former on some signals but not others, of a circuit including a battery, a message-recording instrument, the operatingmagnet of which is responsive to the changes in said battery-circuit caused by the m ulti plesignal transmitter, and a polarized signal-receiving instrument, also connected in said battery-circuit and responsive to the alternating impulses, substantially as described.

The combination, with a signal-box containing a multiple-signal transmitter and an instrument for sending alternating impulses, and means for operating the latter in conjunction with the former on some signals but not others, of a circuit including a battery, a message-recording instrument, the operatingmagnet of which is responsive to the changes in said battery-circuit caused by the multiplesignal transmitter, a polarized relay connected in said circuit and responsive to the alternating impulses, a local circuit and bell therein, and a circuit-closercontrolled by the armature of said polarized relay, substantially as described.

3. In a municipal telegraph system comprising a main and several sub-stations connected by a circuit including a battery, a multiple-signal transmitter at the sub-stations having as a co-operative part of it a pointer for placing the transmitter in condition for transmitting difierent signals, an actuatingpull for the transmitter, a magneto-electric generator also at the sub-station, operated by the actuating-pull, and means, substantially as described, for operatively connecting and disconnecting the said magneto-electric generator and actuating-pull, whereby the said generator may be operated to accompany some of the signals and not others, combined with a message-recording instrument at the main station, and also a polarized signal-receiving instrument responsive to the impulses produced by the magneto-electric generator, substantially as described.

4. In a signal-box, a multiple-signal transmitter and an actuating-pull therefor, combined with a magneto-electric generator which is operatively connected with and discon: nected from the actuating-pull at will, sub stantially as described.

5. In a signal-box, a multiple-signal transmitter having as a-co-operative part of ita pointer normally concealed by a door, a handoperative actuating-pull for the transmitter accessible when the door is open, and an outside key which operates said actuating-pull, combined with a magneto-electric generator operated by the said actuating-pull, substantially as described.

6. In a signal-box, the multiple-signal transmitter havingas a co-operative part of it a Witnesses:

G. W. GREGORY, HOWARD F. EATON. 

